Loans and Allowance for Loan Losses (Schedule of Non-accrual Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Non-accrual loans	$ 1,558	$ 1,941
One-to-four family residential [Member]
Non-accrual loans	1,473	1,733
Nonresidential real estate and land Portfolio Segment [Member]
Non-accrual loans	85	208
All other mortgage loans [Member]
Non-accrual loans
Commercial business loans [Member]
Non-accrual loans
Consumer loans [Member]
Non-accrual loans